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Overlayfs-etc is useful if the rootfs is read-only. One reason to have the rootfs read-only is to allow image based updating. Image based updating will change the underlying root file system, which is unsupported by overlayfs when with some mount options [1]. This disables those options. [1] https://www.kernel.org/doc/html/latest/filesystems/overlayfs.html?highlight=overlayfs#changes-to-underlying-filesystems (From OE-Core rev: 13a057d6ffc3110f891224d7af9455b53581e8a8) Signed-off-by: Claudius Heine <ch@denx.de> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>